首页> 外文期刊>Acta biomaterialia >Modulation of alignment, elongation and contraction of cardiomyocytes through a combination of nanotopography and rigidity of substrates.
【24h】

Modulation of alignment, elongation and contraction of cardiomyocytes through a combination of nanotopography and rigidity of substrates.

机译:通过纳米形貌和基质刚性的组合来调节心肌细胞的排列,伸长和收缩。

获取原文
获取原文并翻译 | 示例
           

摘要

The topographic and mechanical characteristics of engineered tissue constructs, simulating native tissues, should benefit tissue engineering. Previous studies reported that surface topography and substrate rigidity provide biomechanical cues to modulate cellular responses such as alignment, migration and differentiation. To fully address this issue, the present study aimed to examine the influence of nanogrooved substrates with different stiffnesses on the responses of rat cardiomyocytes. Nanogrooved substrates (450nm in groove/ridge width; 100 or 350nm in depth) made of polystyrene and polyurethane were prepared by imprinting from polydimethylsiloxane molds. The morphology and orientation of cardiomyocytes attached to the substrates were found to be influenced mainly by the nanogrooved structures, while the contractile function of the cells was regulated by the coupled effect of surface topography and substrate stiffness. The distribution of intracellular structural proteins such as vinculin and F-actin showed that the surface topography and substrate stiffness regulated the organization of the actin cytoskeleton and focal adhesion complexes, and consequently the contractile behavior of the cardiomyocytes. The beating rates of the cultured cardiomyocytes were dependent on both the surface topography and the substrate stiffness. The study provides insights into the interaction between cardiomyocytes and biomaterials, and benefits cardiac tissue engineering.
机译:模拟天然组织的工程组织构建体的形貌和力学特征应有益于组织工程。先前的研究报道,表面形貌和基底刚性提供了生物力学线索来调节细胞反应,如排列,迁移和分化。为了充分解决这个问题,本研究旨在检查具有不同刚度的纳米沟槽基质对大鼠心肌细胞反应的影响。通过从聚二甲基硅氧烷模具压印来制备由聚苯乙烯和聚氨酯制成的纳米沟槽基底(沟槽/脊宽度为450nm;深度为100或350nm)。发现附着在基质上的心肌细胞的形态和方向主要受纳米槽结构的影响,而细胞的收缩功能受表面形貌和基质刚度的耦合作用调节。细胞内结构蛋白(例如长春菊酯和F-肌动蛋白)的分布表明表面形貌和底物刚度调节肌动蛋白细胞骨架和粘着斑复合物的组织,从而调节心肌细胞的收缩行为。培养的心肌细胞的跳动率取决于表面形貌和基质硬度。该研究提供了有关心肌细胞与生物材料之间相互作用的见解,并有益于心脏组织工程。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号